var express = require('express');
var fs = require("fs");
var app = express();

//方法1：通过express.static访问静态文件，这里访问的是ajax.html
app.use(express.static("./"));

//方法2：使用fs.readFile打开html文件
app.get("/", function(request, response) {
    fs.readFile("./systemServer.html" + request.path.substr(1), function(err, data) {
        // body
        if (err) {
            console.log(err);
            //404：NOT FOUND
            response.writeHead(404, { "Content-Type": "text/html" });
        } else {
            //200：OK
            response.writeHead(200, { "Content-Type": "text/html" });
            response.write(data.toString());
        }
        response.end();
    });
});

app.listen(3000, function() { //监听http://127.0.0.1:3000端口
    console.log("server start:http://127.0.0.1:3000");
});